SEVENTEENTH ANNUAL REPORT. 



459 



20. External angle of second palpal article rounded (Europe, Asia, Africa) . ff. punctata. 

 External angle of second palpal article angular 21 



21. Each palpus nearly as broad as long 22 



Each palpus much longer than broad ff. leporis-palustris. 



22. Third palpal article ivith ventral retrograde projection 23 



Third palpal article without ventral retrograde projection (New Guinea, Aus- 

 tralia) papuana. 



23. Cervical furrows very deep; second and third palpal articles not separated by 



a reentrant angle (Asia) H- fiava. 



Cervical furrows rudimentary ; second and third palpal articles separated later- 

 ally by a reentrant angle (Madagascar) H. simplex. 



24. Dorsal surface of palpi, longer than broad (Madagascar) H. elongata. 



Dorsal surface of palpi as broad as long or broader (Africa) IT. Leachi. 



C. — Based upon the denticles of the hypostome. 



Two rows on each half; nymph; American JT. leporis-palustris. 



Two rows on each half; nymph and larva; not American H. punctata. 



Three rows: H. leporis-palustris $ ^ H. simplex, nymph; H. elongata $ 9. 



Four rows: H. fiava $ ^ ; H. Birmanim 9 ; IT papuana $ ^ ; IT. bispinosa 9 ; H. 



simplex $ ; H. Teachi 9 ; H. cornigera 9 ; H. spinigera 9 ; IT. Canes- 



trinii $ , 



Five rows: H. punctata $ ^ ; H. rhinolophi 9 ; H. fiava $ ; H. Birmanise $ ; H. con- 

 cinna 9 ; IT. hystricis $ ^ ; H. Teachi $ ^ ; H. cornigera $ ; H. cus- 

 cobia $ ; H. spinigera $ . 



Six rows: H. fiava $ ; H. condnna $ ; H. asiatica $ . 



Seven rows : H. Gestroi 9 • 



Subfamily Ixodinse^ Salmon & Stiles, 1901. 



Subfamily diagnosis. — Txodidse: Palpi long, usually about the same length as the 

 hypostome. 

 Type genus. — Ixodes. 



This subfamily includes the genera Ixodes, Eschatocephahcs, Apo- 

 nomm.a^ AwMyomma^ and IIyalo7mna. (For analytical key, see p. 385.) 



Genus Ixodes" Latreille, 1796. 



(teneric diagnosis. — Ixodinx: Eyes absent. Palpi long. Anal groove open or 

 closed caudad, but tangent to the anus by its anterior concavity. Tarsi without ter- 



Synonymy and Bibliography. 



1844: Fam. Txodiden Koch, 1844, pp. 220-234.— Idem, 1847, pp. 13-23. 

 1861: Fam. Ixodides FIirstenberg, 1861, p. 208. 



1890: Cultripalpi Canestrini, 1890, p. 491. [See also Neumann, 1899, p. 107.] 



1892: Fam. Txodidse Marx, 1892, pp. 233, 234, 235. 



1892: ITsemalastoridx Marx, 1892, pp. 234, 235. 



1892: Eschatocephalidx Marx, 1892, pp. 233, 234. 



1899: Tribe Txodx Neumann, 1899, pp. 107-294. 



1901: Subfam. Txodinse Salmon & Stiles, 1901, pp. 458-478. 



^Synonymy and Bibliography. 



1796: Ixodes Latreille, 1796, p. 179; type, Acarus ricinus. — Idem, 1804, pp. 46, 51- 

 53.— Idem, 1806, pp. 155-159.— Idem, 1829, pp. 287, 288.— Fabricius, 1805, 



